Diodes Incorporated PT7M6126NLTA3EX

Overview

PT7M6126NLTA3EX from Pericom Semiconductor is a precision ultra-low-power voltage detector with 2.6V threshold, ±1.5% accuracy at 25°C, 0.9µA supply current at 3V, and N-channel open-drain active-low reset output in SOT23-3 package. It monitors VCC in battery-powered microcontrollers, portable instrumentation, and power management circuits where reliable brown-out detection is required.

For engineers reviewing the PT7M6126NLTA3EX datasheet, PT7M6126NLTA3EX pinout, PT7M6126NLTA3EX application, or PT7M6126NLTA3EX equivalent, key selection criteria include threshold tolerance over temperature (±2.5% × Typ), propagation delay (17µs), hysteresis (5%), operating voltage range (1.2V–5.5V), and open-drain drive capability (1mA sink).

Technical Context

The PT7M6126NLTA3EX integrates a precision bandgap reference, comparator, and internally trimmed resistor network to set a fixed 2.6V detection threshold (VTH−) with 5% hysteresis (VTH+ = 1.05 × VTH−). Its internal architecture eliminates external calibration components while maintaining stability across −40°C to +85°C.

It operates as a dedicated power-on reset supervisor: RST asserts low when VCC falls below 2.6V and releases only after VCC rises above 2.73V. The N-channel open-drain output requires an external pull-up for system-level reset signaling and supports direct interface with µC reset inputs.

Key Specifications

Pinout & Package

SOT23-3 package: 1.3mm × 2.9mm footprint, 1.45mm height, JEDEC MO-178AA compliant, lead-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage supervisor applications.

Compared with PT7M6126NLTA3EX, TLV803EB26DBZR offers lower current but sacrifices open-drain flexibility, while APX803S-26SA-7 matches the output topology but trades off accuracy and power efficiency - making PT7M6126NLTA3EX optimal for precision, low-power, multi-drop reset buses.

Availability

PT7M6126NLTA3EX is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, and smart meter battery backup systems requiring stable component supply, long-lifecycle support, and consistent parametric performance.

Supply support for PT7M6126NLTA3EX includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Pericom Semiconductor (now part of Diodes Incorporated) is a fabless analog/mixed-signal IC designer specializing in high-reliability interface, timing, and power management solutions for communications and industrial markets.

The PT7M61xx series was designed specifically for ultra-low-power voltage supervision in space-constrained, battery-sensitive applications - delivering precision detection without external components across 1.8V–5.0V thresholds in 100mV steps.

FAQ

What is the exact detect threshold voltage and its tolerance for PT7M6126NLTA3EX?

The PT7M6126NLTA3EX has a nominal detect threshold (VTH−) of 2.6V with ±1.5% accuracy at 25°C. Over the full operating temperature range (−40°C to +85°C), the threshold variation is specified as ±2.5% × typical value, meaning worst-case deviation remains within ±2.5% of 2.6V (i.e., 2.535V to 2.665V).

Can PT7M6126NLTA3EX be used with a 5V pull-up on the RST pin?

Yes - the open-drain RST output is rated for 6V maximum voltage and can safely interface with 5V pull-ups. The device guarantees VOL ≤ 0.3V at 1mA sink current, ensuring clean logic-low assertion compatible with 5V-tolerant microcontroller reset inputs.

Does PT7M6126NLTA3EX require an external capacitor on the VCC pin?

Yes - the datasheet specifies a minimum 0.1µF ceramic capacitor between VCC and GND, placed as close as possible to the device pins. This stabilizes the internal reference and prevents false resets caused by supply noise or transient droop during load switching.

How does the 5% hysteresis function in PT7M6126NLTA3EX?

Hysteresis is implemented internally: RST de-asserts only when VCC rises above VTH+ = 1.05 × VTH− = 2.73V. This 130mV gap prevents chattering during slow or noisy VCC recovery, eliminating the need for external RC networks or comparator feedback paths.